A. Clear the app cache by going to your device settings, selecting 'General', then 'iPhone Storage', finding Shadow Fight 4, and tapping 'Offload App'. This will remove the app but keep its data. Reinstall the app to clear any corrupted files.

B. Ensure your device has enough storage space. Go to 'Settings', then 'General', and check 'iPhone Storage'. If storage is low, delete unnecessary apps or files.